import router from './router'
import store from './store'
import { Message } from 'element-ui'
import NProgress from 'nprogress' // progress bar
import 'nprogress/nprogress.css' // progress bar style
import { getToken } from '@/utils/auth' // get token from cookie
import getPageTitle from '@/utils/get-page-title'

NProgress.configure({ showSpinner: false }) // NProgress Configuration

const whiteList = ['/login'] // no redirect whitelist

router.beforeEach(async(to, from, next) => {
  // start progress bar
  NProgress.start()

  // set page title
  document.title = getPageTitle(to.meta.title)

  // determine whether the user has logged in
  const hasToken = getToken()

  // 判断是否存在token,没有就重新登陆
  if (hasToken) {
    if (!store.getters.roles.length) {
      try {
        // 等待用户信息加载
        await store.dispatch('user/getInfo')
        const { roles } = store.getters
        const hasRoles = roles && roles.length > 0
        if(hasRoles){
          try {
            //获取通过权限验证的路由
            const accessRoutes = await store.dispatch('permission/generateRoutes', roles)//第二步
            //更新加载路由
            router.options.routes = store.getters.permission_routes//第三步
            router.addRoutes(accessRoutes)
            next({ ...to, replace: true })
          } catch (error) {
            await store.dispatch('user/resetToken')
            Message.error(error || 'Has Error')
            next(`/login?redirect=${to.path}`)
            NProgress.done()
          }
        }
      } catch (error) {
        await store.dispatch('user/resetToken')
        next(`/login?redirect=${to.path}`)
      }
    } else {
      next()
    }
  } else {
    /* has no token*/

    if (whiteList.indexOf(to.path) !== -1) {
      // in the free login whitelist, go directly
      next()
    } else {
      // other pages that do not have permission to access are redirected to the login page.
      next(`/login?redirect=${to.path}`)
      NProgress.done()
    }
  }
})

router.afterEach(() => {
  // finish progress bar
  NProgress.done()
})
